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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/sound/core/rawmidi_compat.c
....@@ -1,21 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *   32bit -> 64bit ioctl wrapper for raw MIDI API
34  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
4
- *
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- *   This program is free software; you can redistribute it and/or modify
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- *   it under the terms of the GNU General Public License as published by
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- *   the Free Software Foundation; either version 2 of the License, or
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- *   (at your option) any later version.
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- *
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- *   This program is distributed in the hope that it will be useful,
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- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
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- *
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- *   You should have received a copy of the GNU General Public License
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- *   along with this program; if not, write to the Free Software
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- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
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- *
195  */
206 
217 /* This file included from rawmidi.c */
....@@ -55,19 +41,22 @@
5541 	return -EINVAL;
5642 }
5743 
58
-struct snd_rawmidi_status32 {
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+struct compat_snd_rawmidi_status64 {
5945 	s32 stream;
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-	struct compat_timespec tstamp;
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+	u8 rsvd[4]; /* alignment */
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+	s64 tstamp_sec;
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+	s64 tstamp_nsec;
6149 	u32 avail;
6250 	u32 xruns;
6351 	unsigned char reserved[16];
6452 } __attribute__((packed));
6553 
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-static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
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-					   struct snd_rawmidi_status32 __user *src)
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+static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile,
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+					     struct compat_snd_rawmidi_status64 __user *src)
6856 {
6957 	int err;
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-	struct snd_rawmidi_status status;
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+	struct snd_rawmidi_status64 status;
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+	struct compat_snd_rawmidi_status64 compat_status;
7160 
7261 	if (get_user(status.stream, &src->stream))
7362 		return -EFAULT;
....@@ -89,68 +78,24 @@
8978 	if (err < 0)
9079 		return err;
9180 
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-	if (compat_put_timespec(&status.tstamp, &src->tstamp) ||
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-	    put_user(status.avail, &src->avail) ||
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-	    put_user(status.xruns, &src->xruns))
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+	compat_status = (struct compat_snd_rawmidi_status64) {
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+		.stream = status.stream,
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+		.tstamp_sec = status.tstamp_sec,
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+		.tstamp_nsec = status.tstamp_nsec,
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+		.avail = status.avail,
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+		.xruns = status.xruns,
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+	};
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+
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+	if (copy_to_user(src, &compat_status, sizeof(*src)))
9590 		return -EFAULT;
9691 
9792 	return 0;
9893 }
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-
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-#ifdef CONFIG_X86_X32
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-/* X32 ABI has 64bit timespec and 64bit alignment */
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-struct snd_rawmidi_status_x32 {
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-	s32 stream;
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-	u32 rsvd; /* alignment */
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-	struct timespec tstamp;
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-	u32 avail;
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-	u32 xruns;
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-	unsigned char reserved[16];
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-} __attribute__((packed));
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-
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-#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
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-
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-static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile,
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-					struct snd_rawmidi_status_x32 __user *src)
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-{
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-	int err;
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-	struct snd_rawmidi_status status;
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-
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-	if (get_user(status.stream, &src->stream))
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-		return -EFAULT;
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-
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-	switch (status.stream) {
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-	case SNDRV_RAWMIDI_STREAM_OUTPUT:
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-		if (!rfile->output)
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-			return -EINVAL;
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-		err = snd_rawmidi_output_status(rfile->output, &status);
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-		break;
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-	case SNDRV_RAWMIDI_STREAM_INPUT:
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-		if (!rfile->input)
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-			return -EINVAL;
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-		err = snd_rawmidi_input_status(rfile->input, &status);
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-		break;
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-	default:
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-		return -EINVAL;
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-	}
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-	if (err < 0)
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-		return err;
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-
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-	if (put_timespec(&status.tstamp, &src->tstamp) ||
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-	    put_user(status.avail, &src->avail) ||
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-	    put_user(status.xruns, &src->xruns))
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-		return -EFAULT;
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-
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-	return 0;
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-}
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-#endif /* CONFIG_X86_X32 */
14794 
14895 enum {
14996 	SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
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-	SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
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-#ifdef CONFIG_X86_X32
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-	SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32),
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-#endif /* CONFIG_X86_X32 */
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+	SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
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+	SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64 = _IOWR('W', 0x20, struct compat_snd_rawmidi_status64),
15499 };
155100 
156101 static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
....@@ -167,12 +112,10 @@
167112 		return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
168113 	case SNDRV_RAWMIDI_IOCTL_PARAMS32:
169114 		return snd_rawmidi_ioctl_params_compat(rfile, argp);
170
-	case SNDRV_RAWMIDI_IOCTL_STATUS32:
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-		return snd_rawmidi_ioctl_status_compat(rfile, argp);
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-#ifdef CONFIG_X86_X32
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-	case SNDRV_RAWMIDI_IOCTL_STATUS_X32:
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-		return snd_rawmidi_ioctl_status_x32(rfile, argp);
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-#endif /* CONFIG_X86_X32 */
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+	case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32:
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+		return snd_rawmidi_ioctl_status32(rfile, argp);
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+	case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64:
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+		return snd_rawmidi_ioctl_status_compat64(rfile, argp);
176119 	}
177120 	return -ENOIOCTLCMD;
178121 }